<?php
/**
 * Created by PhpStorm.
 * User: zhangrongxiang
 * Date: 2018/3/8
 * Time: 下午9:48
 */
$str = "Hello fri3nd, you're
       looking          good today!";

//[0] => Hello
//[1] => fri
//[2] => nd
//[3] => you're
//[4] => looking
//[5] => good
//[6] => today
print_r( str_word_count( $str, 1 ) );

//[0] => Hello
//[6] => fri
//[10] => nd
//[14] => you're
//[28] => looking
//[45] => good
//[50] => today
print_r( str_word_count( $str, 2 ) );

//[0] => Hello
//[1] => fri3nd
//[2] => you're
//[3] => looking
//[4] => good
//[5] => today
print_r( str_word_count( $str, 1, 'àáãç3' ) );

//[0] => Hello
//[1] => fri3nd
//[2] => you're
//[3] => looking
//[4] => good
//[5] => today
//[6] => look123
//[7] => ing
$str = "Hello fri3nd, you're
       looking          good today!
       look1234ing";
print_r( str_word_count( $str, 1, '0..3' ) );
